Buick LeSabre 1965 Service Manual page 59

ENGINE
HEADS AND VALVES 2 - 3 7
5. Remove harmonic balancer to
crankshaft bolt and washer 15/16"
socket. Remove harmonic bal-
ancer. It may be necessary to
tap the balancer with a plastic
m a l l e t to start it off t h e
crankshaft.
6. If car is equipped with power
steering, remove steering pump
bracket bolts attached to timing
chain cover and loosen or remove
other bolts to allow the brackets
and pump to be moved out of the
way.
7. Disconnect fuel lines and re-
move fuel pump.
8. Remove Delcotron generator
and brackets.
9. Remove distributor cap and
pull spark plug wire retainers
off brackets on rocker arm cover.
Swing distributor cap with wires
attached out of the way. Discon-
nect distributor primary lead.
10. Remove distributor. If tim-
ing chain and sprockets are not
going to be disturbed, note po-
sition of distributor rotor for
reinstallation in same position.
11. Loosen and slide front clamp
on thermostat by-pass h o s e
rearward.
12. Remove bolts attaching tim-
ing chain cover to cylinder block.
Remove two oil pan to timing
chain cover bolts. Remove timing
chain cover assembly and gasket.
Thoroughly clean the cover, tak-
ing care to avoid damage to the
gasket surfaces.
b. Crankshaft Oil Seal
Replacement
1. Use a punch to drive out old
seal and shedder. Drive from the
front toward the rear of the tim-
ing chain cover.
2. Coil new packing around open-
ing so ends of packing are at top.
Drive in new shedder using suita-
ble punch. Stake the shedder in
place in at least three places.
3. Size the packing by rotating
a hammer handle or similar
smooth tool around the packing
till the balancer hub can be in-
serted through the opening.
c. Timing Chain Cover
Replacement
Reinstall timing chain cover by
reversing removal procedure,
paying particular attention to the
following points.
1. Remove oil pump cover and
pack the space around the oil
pump gears completely full of
petroleum jelly. There must be
no air space left inside the pump.
Reinstall cover using new gasket.
This step is very important as
the oil pump may "lose its
prime'' whenever the pump, pump
cover or timing chain cover is
disturbed. If the pump is not
packed, it may not begin to pump
oil as soon as the engine is
started.
2. The gasket surface of t h e
block and timing chain cover
must be smooth and clean. Use
a new gasket and be certain it is
positioned correctly.
3. Position timing chain cover
against block and be certain dowel
pins engage dowel pin holes be-
fore starting bolts.
4. Lube the bolt threads before
installation and install.
NOTE: If the car is equipped
with power steering the front
steering pump bracket should be
installed at this time.
5. Lube the O.D. of the harmonic
balancer before installation to
prevent damage to the seal dur-
ing installation and when the en-
gine is first started.
d. Timing Chain and Sprocket
Removal
1. With timing chain cover re-
moved (subpar. a above) tempo-
rarily install harmonic balancer
bolt and washer in end of crank-
shaft. Turn crankshaft so sprock-
ets are positioned. Doing so will
make it easier to reinstall parts.
Remove harmonic balancer bolt
and washer using a sharp rap on
the wrench handle to start the
bolt out without changing position
of sprockets.
2. Remove front crankshaft oil
slinger.
3. Remove bolt and special wash-
er retaining camshaft distributor
drive gear and fuel pump ec-
centric to camshaft forward end.
Slide gear and eccentric off
camshaft.
4. Use two large screwdrivers
to alternately pry the camshaft
sprocket t h e n the crankshaft
sprocket forward until the cam-
shaft sprocket is free, then re-
move the camshaft sprocket and
chain and finish working crank-
shaft sprocket off crankshaft.
5. Thoroughly clean the timing
c h a i n , sprockets, distributor
drive gear, fuel pump eccentric
and crankshaft oil slinger.
e. Timing Chain and Sprocket
Installation
1. Turn crankshaft so number one
piston is at top dead center.
2. Turn camshaft so with sprock-
et temporarily installed, timing
mark is straight down. Remove
sprocket.
3. Assemble timing chain on
sprockets and slide the sprocket
and chain assembly on the shafts
with the timing marks in their
closest together position and in
line with the sprocket hubs.
NOTE: It will be necessary to
hold spring loaded timing chain
damper out of the way while slid-
ing c h a i n and sprockets into
position.
4. Assemble slinger on crank-
shaft with I.D. against sprocket.
(Concave side toward front of
engine).